PETER!!! What a wonderful Sunday surprise!!!! Its 10am, I have my coffee and a perfect video to kick back and enjoy! Hope you and the family are well my friend.
Hello Peter, nice to see you back! Hope you and the family are well. I think we all have those days on and off. I had an intermittent problem on my IC-706 where the radio shut off and came on a second later whether it was cold or hot, so no thermal problem either. The end of the story is after having the radio on and off the bench for months it was a distancing rubber pad which was on the PLL board and the adhesive over time formed a chemical reaction with the small circuit traces underneath and corroded or formed a resistance where the voltage could not be passed on and shut the radio off until there was just enough conduction to make it work again. That was a bummer!!! you put out very educational video clips Peter - Thanks!!
Analysing a fault on a device as complex and compact as this IC7000 is difficult. Describing the process is also difficult. Thank you for your time and effort Peter I've benifited from your knowledge greatly.
A multichannel data logger, monitoring the current to each board/circuit section is very very useful here. You can often identify resistors in the voltage supply line to each section, that will allow you to "see" current changes at the time the fault occurs. Then you just need to use the schematic and your "litte grey cells", as M. Poirot would say!
Welcome back Peter! Glad you're back on UA-cam. I really like your videos. The problem with this ICOM is interesting. I also have to deal with such problems from time to time. Thanks for your experience.
Peter again nice to see you back. These problems are way beyond my understanding but I do understand the frustration they can cause. Good luck in finding the answer.
Hey Peter: So glad to see another video from you, hope you had a great Christmas. Don't you love those sort of faults, just breathe on the unit and it starts behaving itself 😀. Golden screwdrivers, we have several "Repair shops" over here like that. Faulty radio: No problems, we'll just twiddle a few pots and see if that cures it. Have a good new year 🎈👍.
Very nice to hear you peter. I would check the hidden menu to make sure they are set to factory settings. The smd caps are known to go bad early. Thanks for the video. Stay safe out there.👍
Hi Peter, I have had many Icom radios that have had intermittent problems with these flat cables that connect the various modules, especially Icom 910, 706 all and even 746, 7600. the only way is to reinstall new cables, some time one could cut off some mm of the teeth on the old flat cables and reinstall them. Good Luck Sir
Intermittent problems are the worst kind. An intermittent transmit has to be really difficult to narrow down. I have had those problems where a piece of equipment is on the bench for days, weeks, months and more. I would like to know what you find (if anything can be found). Glad you are back.
Hi Peter, Your right, it's really annoying and frustrating, if the fault is not always visible. Thanks for taking us along at your bench. It's very interesting! I wish you all the best, Merry Christmas and a Happy New Year.
Hi Peter, glad to see you re back. I always enjoy your videos. Your experience and professionalism really shows thru. Thank You for you work. I hope you and your family have a Merry Christmas and a Happy new year Pandemic and virus be gone ! 73
Hi, Great to see you back and putting up Video's.........you are one of the few remaining out of the regulars.........just wanted to wish you a very Merry Christmas and a happy new year.
It is wonderful to have you back once again , we have all missed you and your awesome video's , I wish you all the best for christmas and look forward to more of your inspiring videos in the new year.
Peter Your English is far better than my German which is at zero. My Mk 5 VW Golf has a intermittent fault, which has confused the UK engineers, so badly, that this Monday a German VW technician is coming over to fix it, I understand he's bringing a engine management system over with and replacing everything, well I hope he does that as promised . Merry Xmas dear friend 73 Paul M0BSW
Dear Peter, good to see you back! Unfortunately this specific problem is unknown to me, but I've got a suggestion for this situation which may be can help. (Usually it's the other way around.) ;-) For intermittent problems I use the single trigger function of my DS-1054Z digital scope. I'll use channel 1 for triggering, for like an output power drop. The other three channels I use for monitoring critical signals. The memory of the DS-1054 is big enough to store a couple of seconds of information, so I set the timebase rather slow. 500ms per division for example. If the problem occurs, three signals are 'recorded' and can be reviewed later. So the setup can be left alone and then the scope triggered, the fault appeared and the data is recorded. By using the delay time base, the interesting parts of the three other signals can be viewed in detail. Usually I start monitoring the power supply signals. If the three signals are stable, I go to the next signal which seems relevant. At every (fault) trigger, some information is gathered. This takes time, but you don't have to wait for it, just check the triggering every now and then. Eventually some interesting signal will be found I guess. Last month I had a R&S CMT with an intermittent problem. The device restarted after approximately 15 minutes of use. After studying the schematics I found that there's a reset circuit related to the 5 VDC signal. I triggered on the cpu reset signal and monitored different signals like the power supply voltages. Here's an image of the recording: amateurtele.com/images/intermittent_triggering.jpg. The voltages of the supply seemed to be stable which means that the power supply did work during reset. After that I logged the 5 VDC voltage line: www.amateurtele.com/images/voltage_drop.jpg It turned out that the 5 VDC line dropped below 5,2 VDC and the device would reset itself. Maybe this isn't the best example, but I guess you know what I mean and how to use it. ;-) Note: The CMT problem turned out to be bad capacitors which got lower internal resistance and pulled down the voltage. The 'famous' red capacitors...
Hello Peter, I have a Yaesu 747 with a Tx intermittency, purchased in 1991 that after 5 years began dropping transmissions back in the 1996. I was using a G5RV antenna with a tuner. 1) When transmitting into a dummy load the problem NEVER showed up even before replacing the PA (later on). 2) When transmitting into the antenna itself, it was usually OK but then intermittently it would drop out when I pushed PTT or sometimes even during QSO while transmitting. I shipped it to Yaesu repair in California twice. The first time they insisted I did not have a problem and shipped it back. They only transmitted in a resistive load, thousands of cycles for several days. I still had the problem so I shipped it back to them, asking them to transmit into a real antenna that had some reactance (like my G5RV). They agreed to try that. transmitting into the more reactive antenna did they find the problem. They eventually found the problem when transmitting into a real antenna that needed a tuner to cancel out reactance. The problem here was that the repair shop initially had a procedure to do their repairs only using a resistive dummy load and that was too benign of a condition to show my intermittency. I know it is valid to assume that a tuner with a G5RV "tuned" at the 747 output to 1:1 can only be 50 ohm resistive. However, that is only a "steady state" condition. Tuning is not a steady state impedance condition. Neither is the first few milliseconds after pressing PTT into a reactance that needs to be cancelled out. I believe high reactance can slightly damage the transistors in a way that you only notice the problem during transient conditions such as occurs each time you press PTT. But I cannot prove that theory. Another problem was likely my using a G5RV but not always tuning at a low 10 watt power level. Yaesu repair shop never tried to explain what happened; they just replaced the finals (and charged me lol) and all was well in their follow up testing even using the antenna load. As for me, 30 years later, I still use the much maligned G5RV but always tune at no than 10 watts and never had the same problem again with the FT747 or any other radio. But why do I blame myself? It wasn't necessarily me. It also could have been a defective final lol. Merry Christmas!
Damn it sure is good to see you back Peter, your English is just fine my friend, but I want to wish you and your family a very Merry Christmas and wishing you a prosperous new year free from more pandemics.... 73 my friend Jeff de WD8JM
I have used an electric pencil to vibrate intermittent circuit boards. Of course you need to put something over the tip. I have a piece of teflon in a cylinder shape about 15 mm in diameter that I drilled a hole in to slide over the tip. Vibration can sometimes cause the fault to show if it's caused by an intermittent connection.
I'm wondering whether an arduino-based test rig would help, since presumably you can't transmit continuously, even into a dummy load. It could implement a cycle of on and off intervals, testing for failure on each on event. Would something like that prove useful in this context? The software guy in me always jumps to the work reduction possible through automation.
program based solutions are always good but in this case I must see the result when pressing PTT. Working on a different radio makes it sometimes difficult to follow the program interval setting
Wow, it's so good to see you back Peter. I really thought you were gone for good. Thank god. Your the best, I learn so much of my troubleshooting from you. YOUR the best keep it up for a long time. I hope you can get paid for these youtube video's.
Merry Christmas Peter. I have an ICOM 706MK2G that would quit. I poked around and thought I found the problem but no I really didn't. I sent it to ICOM and they couldn't find it either so they had a working test final board that I bought for half price and it's still working. I think it may have been a run in a middle layer of the board that could not be fixed. I guess a jumper couldn't fix it either so they just replaced the board. Again welcome back and I still wish my Deutsch would be as good as your English. Happy New Year.
Good evening Peter, nice to hear from you just bevor the christmas days! I feel with you, i have a horrible TRX on my bench, FT890 with intermittend SSB receive dropout..AM FM fine all the time. Please stay healthy, have a nice time with your family and lets stay in contact. Nice vid as always. 73 de Olaf!
Hi Olaf, ja diese sporadischen Fehler können einen extrem nerven. Hoffe du findest das Problem am 890. Auch für dich und deine Familie wünsche ich besinnliche Weihnachten und bleibt gesund. Bis dahin alles Gute 73
Glad your back, you where missed here! I find that with Intermittent problems one of the secrets is to surrender hopes of fixing it fast and put in the time with a good diagnostic process.
what about doing a recap job on it and retest? could it be a capicitor with intermitiant short? these radios are getting up there in 20yr age mark and will be due for a recap job in a few years in best case scenerio if used lightly.
We have the the USA version of that Icom radio in our community Emergency Operations Center. I doubt it has more than a few minutes transmitting time. It will most likely fail when we need it most.
Hi Peter, great video; merry Christmas and happy new year to you and family 73's. Hallo Peter, tolles Video; frohe Weihnachten und frohes neues Jahr für Sie und Familie 73
Great set of videos. I'm glad you are back we thought you had "disappeared" was gonna ask the aliens for your return ...;-) hope to see more soon ..Cheers
Intermitted problems are a hair puller for sure...I have an ADI 220 radio with intermitted screen issues I gave up on for now lol. Those 7000's where known for over heating which is why I got rid of mine years ago. Hopefully you can get to the root off the problem it'd be interesting to see what happened. Merry Christmas to you and your family and happy New year's. 🎄🥂
Heard a bit of your dilemma re an intermittent drop out.. Don't think this will help but I ran into a problem with an FT757/II where the varactor associated with the PLL, being forward biased by an intermittently bad electrolytic capacitor.. drove me nuts until I caught the little devil in the act.. the small cap showed no evidence of failure.. no leaking, bulging, etc.. So much equipment has been lost to defective electrolytic caps.. Regards, Dennis WB8DT..
Welcome back! Don't worry about your English, your efforts are valiant and handiwork speaks for itself. Every successful repair is a victory over chaos and disintegration. What I would do is replace the largest relevant electrolytic capacitors, maybe all, reflux most or all solder joints, polish all accessible contacts. If it tests as working send it back to the customer with a modest bill for refurbishing, not repair. And a suggestion to contact you should the problem reappear and be more reproduceable.
Haven't watched yet, but just wanted to say thanks for another video and; Merry Christmas Peter to you and your family. "Oh Crisymas Baum, Oh Crisymas Baum"... I hope that's right.
Hi Peter HappyNewyear to you and your family2021. peter there must be a fine hair crack in some of the traces, its just a thought if you could wrap the radio in polythine and put it in a freezer to see if it would give you time to check for the fault just an Idea you friend John
At the other end of the scale is the owner who could have "repaired" his own radio by simply reading the manual to operate the rig correctly. Happened just yesterday the OM wanted me to investigate no output on his HF radio on my bench - 10 minutes on the phone allowed me to remotely diagnose the problem instead and he's a happy camper now (hint: Kenwood rigs used to need you to engage the VOX button to transmit CW!). Hopefully we'll be seeing more videos Peter...maybe the fix for this radio! 73 - Dino KLØS
Hi Peter ! Nice to see you again !....Complicated defect. I saw some videos of the IC7000 with power loss in all bands and the cause was the pre driver. I think the condition changes with the radio open without the covers. Just to comment, Icoms react strangely with high temperatures and high currents. I had a 746pro that had power loss and did not tune in at 15m. the Pre driver had a crack and the bias current was high there was high oscillation at 15M. Well, I hope you can find this "Icom riddle". Good luck and regards - 73 PY2NDB
@@TRXLab Thanks so much for your feedback.I believe you may have already done a number of procedures including this. Is there any significant variation in pa current when in TX ? With the equipment closed checking this condition, if so it may be that the HEATING of the PA stage is heating some track of some SMD component causing with the weld lose conductivity. I've had a problem of this, my solution was a general rewelding, 73's
As simple as this sounds have you checked the mic plug? I imagine you have but what if there is a wire break in the mic cord? Or a loose crimp on the jack? I fully understand intermittent problems you can't fix it until it messes up. good luck finding the problem.
In your case, time is of great importance, that is, the expediency of repair in general. The easiest way, in the presence of spare parts that are known to be in good condition, is to change the boards in turn and check. Then look for the problem in the faulty unit. It's better for the user to sell this radio and buy a new one.
The real question is how much time do you spend chasing the intermittent issue? You may need to have the issue happen more than once to pinpoint the source of the problem. As a mechanic I see intermittent problems all the time on vehicles. Time is money in our business and sometimes if the intermittent issue doesn't show up after an hour of messing with it, we either call the customer and ask for more time or send it down the road.
Realistically the difference between 100 watts and 120 watts is pretty insignificant and not worth the risk. You're better off using your energy on improving your antenna.
Assuming you do NOT intend to be omnidirectional. Important sometimes when calling CQ to any direction such as in contests. I only say that because many times we get suggestions to improve the antenna rather than the amplifier but younger hams also need to know that the price for antenna directive gain is nulls. External linear amps do serve a good purpose in gaining 1 - 2 S units (6-12 dB) using the same antenna, over 100W. A single S unit is a lot. In your example I completely agree, 10log(125/100) =
I have that exact radio in my shack, have you encountered the issue where transmitting / keying the radio would trigger a reset? Checked the SWR and the potential corrosion on the fuse contacts and all is good on that side. That problem too seems to be intermittent.
You can't fix a problem that does not show up. I had a few of these when I was a technician over a 30 year period and customers don't really understand that you don't have a crystal ball and that you can't fix it based on the problem description, you must actually experience it... Was that word you were having trouble with category-- cat-a-gory?
Yeah your back! We were worried about you. So glad to see a video from Peter!
I agree
Peter- Your combination of knowledge & humility make you unique.
Good to see you Peter! We've missed you! Hope you have a good holiday season.
PETER!!! What a wonderful Sunday surprise!!!! Its 10am, I have my coffee and a perfect video to kick back and enjoy! Hope you and the family are well my friend.
Thank you Brian!
Hello Peter, nice to see you back! Hope you and the family are well. I think we all have those days on and off. I had an intermittent problem on my IC-706 where the radio shut off and came on a second later whether it was cold or hot, so no thermal problem either. The end of the story is after having the radio on and off the bench for months it was a distancing rubber pad which was on the PLL board and the adhesive over time formed a chemical reaction with the small circuit traces underneath and corroded or formed a resistance where the voltage could not be passed on and shut the radio off until there was just enough conduction to make it work again. That was a bummer!!! you put out very educational video clips Peter - Thanks!!
that is how it goes..Thanks for feed back
Analysing a fault on a device as complex and compact as this IC7000 is difficult. Describing the process is also difficult. Thank you for your time and effort Peter I've benifited from your knowledge greatly.
Hey Peter. Good to see you. I seem to always get these kinds of problems.
But with ancient tube radios 😆
Hi Buddy good to see you hope you are doing well! Yeah this kind of faults are a nightmare. Take care my friend
A multichannel data logger, monitoring the current to each board/circuit section is very very useful here. You can often identify resistors in the voltage supply line to each section, that will allow you to "see" current changes at the time the fault occurs. Then you just need to use the schematic and your "litte grey cells", as M. Poirot would say!
Welcome back Peter! Glad you're back on UA-cam. I really like your videos. The problem with this ICOM is interesting. I also have to deal with such problems from time to time. Thanks for your experience.
Peter again nice to see you back. These problems are way beyond my understanding but I do understand the frustration they can cause. Good luck in finding the answer.
Hey Peter: So glad to see another video from you, hope you had a great Christmas. Don't you love those sort of faults, just breathe on the unit and it starts behaving itself 😀. Golden screwdrivers, we have several "Repair shops" over here like that. Faulty radio: No problems, we'll just twiddle a few pots and see if that cures it. Have a good new year 🎈👍.
Very nice to hear you peter. I would check the hidden menu to make sure they are set to factory settings. The smd caps are known to go bad early. Thanks for the video. Stay safe out there.👍
Happy to see you again.
Great to see you back making videos. Another great video even if it is an annoying problem. Intermittent problems are the worst thing anyone can face.
Hi Peter, I have had many Icom radios that have had intermittent problems with these flat cables that connect the various modules, especially Icom 910, 706 all and even 746, 7600. the only way is to reinstall new cables, some time one could cut off some mm of the teeth on the old flat cables and reinstall them. Good Luck Sir
yeah the ribbon cables are a mess...
You can't fix what isn't broken, intermittent faults are very frustrating. Happy Christmas Peter, glad to see you back.
Intermittent problems are the worst kind. An intermittent transmit has to be really difficult to narrow down. I have had those problems where a piece of equipment is on the bench for days, weeks, months and more. I would like to know what you find (if anything can be found). Glad you are back.
Hi Peter,
Your right, it's really annoying and frustrating, if the fault is not always visible.
Thanks for taking us along at your bench.
It's very interesting!
I wish you all the best, Merry Christmas and a Happy New Year.
Hello Peter so glad to see you. My best wishes to you and the family
Hi Peter, glad to see you re back. I always enjoy your videos. Your experience and professionalism really shows thru. Thank You for you work. I hope you and your family have a Merry Christmas and a Happy new year Pandemic and virus be gone ! 73
Thank you Konrad! Have a Merry Christmas for you too.
everything looks easier when other people are doing it. But there is also behind the scenes.
Thank you, again for these great video.
Hi, Great to see you back and putting up Video's.........you are one of the few remaining out of the regulars.........just wanted to wish you a very Merry Christmas and a happy new year.
Thank you and have a very nice Christmas as well
A flaky solder connection or a failing semiconductor; so many parts to consider. Glad you are producing videos again. Happy Holidays.
yes you are right so many parts to consider.. Happy holidays for you as well.
It is wonderful to have you back once again , we have all missed you and your awesome video's , I wish you all the best for christmas and look forward to more of your inspiring videos in the new year.
back! We were worried about you. So glad to see a video from Peter
Hi Peter. Happy to see that you are back Merry Christmas. 73s
Glad your back. Missed you here in Wisconsin
I love your channel so much. It was empty without your video's.
Peter Your English is far better than my German which is at zero. My Mk 5 VW Golf has a intermittent fault, which has confused the UK engineers, so badly, that this Monday a German VW technician is coming over to fix it, I understand he's bringing a engine management system over with and replacing everything, well I hope he does that as promised . Merry Xmas dear friend 73 Paul M0BSW
Thanks Paul! Hope the fault can be fond...Merry X-mas dear friend
Peter, I hope you and your family have a wonderful Christmas. Please stay healthy and safe.
Ya man!
Welcome back!
I wish you success and good health.
old caps was the issue with one of the radios i repaired for a friend. nice to see you back to you tube... 73
Dear Peter, good to see you back!
Unfortunately this specific problem is unknown to me, but I've got a suggestion for this situation which may be can help. (Usually it's the other way around.) ;-)
For intermittent problems I use the single trigger function of my DS-1054Z digital scope. I'll use channel 1 for triggering, for like an output power drop. The other three channels I use for monitoring critical signals. The memory of the DS-1054 is big enough to store a couple of seconds of information, so I set the timebase rather slow. 500ms per division for example. If the problem occurs, three signals are 'recorded' and can be reviewed later. So the setup can be left alone and then the scope triggered, the fault appeared and the data is recorded. By using the delay time base, the interesting parts of the three other signals can be viewed in detail. Usually I start monitoring the power supply signals. If the three signals are stable, I go to the next signal which seems relevant. At every (fault) trigger, some information is gathered. This takes time, but you don't have to wait for it, just check the triggering every now and then. Eventually some interesting signal will be found I guess.
Last month I had a R&S CMT with an intermittent problem. The device restarted after approximately 15 minutes of use. After studying the schematics I found that there's a reset circuit related to the 5 VDC signal. I triggered on the cpu reset signal and monitored different signals like the power supply voltages. Here's an image of the recording: amateurtele.com/images/intermittent_triggering.jpg. The voltages of the supply seemed to be stable which means that the power supply did work during reset. After that I logged the 5 VDC voltage line: www.amateurtele.com/images/voltage_drop.jpg It turned out that the 5 VDC line dropped below 5,2 VDC and the device would reset itself. Maybe this isn't the best example, but I guess you know what I mean and how to use it. ;-) Note: The CMT problem turned out to be bad capacitors which got lower internal resistance and pulled down the voltage. The 'famous' red capacitors...
good points thanks for feed back and contribution to our community , Jacob!
Woaw!!!!!!!!!!!!!! You back man! I am happy to see you again!
I am very happy you are back. 🙂
Hello Peter, I have a Yaesu 747 with a Tx intermittency, purchased in 1991 that after 5 years began dropping transmissions back in the 1996. I was using a G5RV antenna with a tuner.
1) When transmitting into a dummy load the problem NEVER showed up even before replacing the PA (later on).
2) When transmitting into the antenna itself, it was usually OK but then intermittently it would drop out when I pushed PTT or sometimes even during QSO while transmitting.
I shipped it to Yaesu repair in California twice. The first time they insisted I did not have a problem and shipped it back. They only transmitted in a resistive load, thousands of cycles for several days. I still had the problem so I shipped it back to them, asking them to transmit into a real antenna that had some reactance (like my G5RV). They agreed to try that.
transmitting into the more reactive antenna did they find the problem.
They eventually found the problem when transmitting into a real antenna that needed a tuner to cancel out reactance.
The problem here was that the repair shop initially had a procedure to do their repairs only using a resistive dummy load and that was too benign of a condition to show my intermittency.
I know it is valid to assume that a tuner with a G5RV "tuned" at the 747 output to 1:1 can only be 50 ohm resistive. However, that is only a "steady state" condition. Tuning is not a steady state impedance condition. Neither is the first few milliseconds after pressing PTT into a reactance that needs to be cancelled out. I believe high reactance can slightly damage the transistors in a way that you only notice the problem during transient conditions such as occurs each time you press PTT. But I cannot prove that theory.
Another problem was likely my using a G5RV but not always tuning at a low 10 watt power level.
Yaesu repair shop never tried to explain what happened; they just replaced the finals (and charged me lol) and all was well in their follow up testing even using the antenna load.
As for me, 30 years later, I still use the much maligned G5RV but always tune at no than 10 watts and never had the same problem again with the FT747 or any other radio.
But why do I blame myself? It wasn't necessarily me. It also could have been a defective final lol. Merry Christmas!
thanks for the nice contribution to our community
Intermittent or inconsistent faults are the WORST.
Great to see you back...you were really missed
Damn it sure is good to see you back Peter, your English is just fine my friend, but I want to wish you and your family a very Merry Christmas and wishing you a prosperous new year free from more pandemics....
73 my friend
Jeff de WD8JM
Thank you Jeff! For you and yours happy x-mas and stay safe.
Tighten all screws, I have seen flux under a screw cause that or a similar problem, I have a pile for rainy day projects. Merry Christmas.
Disassemble't and Check the solder joints of antenna connector and other connector and pin diode
Hello again Peter. Glad you found the time to make another video. 73 Roger
What is 73 pls?
I have used an electric pencil to vibrate intermittent circuit boards. Of course you need to put something over the tip. I have a piece of teflon in a cylinder shape about 15 mm in diameter that I drilled a hole in to slide over the tip. Vibration can sometimes cause the fault to show if it's caused by an intermittent connection.
I'm wondering whether an arduino-based test rig would help, since presumably you can't transmit continuously, even into a dummy load. It could implement a cycle of on and off intervals, testing for failure on each on event. Would something like that prove useful in this context? The software guy in me always jumps to the work reduction possible through automation.
good idea
program based solutions are always good but in this case I must see the result when pressing PTT. Working on a different radio makes it sometimes difficult to follow the program interval setting
Happy to see you again! Happy, really happy!
Check the heat sink compound, it could be dry, letting it heat up
So glad you're back! I was starting to give up hope!
So happy to see you back again!!!😍 Great video Peter.
Wow, it's so good to see you back Peter. I really thought you were gone for good. Thank god. Your the best, I learn so much of my troubleshooting from you. YOUR the best keep it up for a long time. I hope you can get paid for these youtube video's.
Peter, Merry Christmas and Happy New Year to you! Thanks for another great video.
Merry X-Mas Bob.
Merry Christmas Peter. I have an ICOM 706MK2G that would quit. I poked around and thought I found the problem but no I really didn't. I sent it to ICOM and they couldn't find it either so they had a working test final board that I bought for half price and it's still working. I think it may have been a run in a middle layer of the board that could not be fixed. I guess a jumper couldn't fix it either so they just replaced the board. Again welcome back and I still wish my Deutsch would be as good as your English. Happy New Year.
You was lucky with your 706...Thanks for your feed back. Merry x-mas OJ
Good evening Peter, nice to hear from you just bevor the christmas days! I feel with you, i have a horrible TRX on my bench, FT890 with intermittend SSB receive dropout..AM FM fine all the time. Please stay healthy, have a nice time with your family and lets stay in contact. Nice vid as always. 73 de Olaf!
Hi Olaf, ja diese sporadischen Fehler können einen extrem nerven. Hoffe du findest das Problem am 890. Auch für dich und deine Familie wünsche ich besinnliche Weihnachten und bleibt gesund. Bis dahin alles Gute 73
My Icom 706mkllg was doing the same thing it the trimmer cap works great now
The RF output on the 991A is very dirty, wonder if adjusting the bias improves it significantly.
Glad your back, you where missed here! I find that with Intermittent problems one of the secrets is to surrender hopes of fixing it fast and put in the time with a good diagnostic process.
Thanks Peter, have a good Christmas break 👍🇬🇧❤️
Merry Christmas Peter , nice to see a new video again
Merry x-mas
I always like using a good thermal camera for troubleshooting in my lab, It can turn hours/days of work into minutes. Great video!
what about doing a recap job on it and retest? could it be a capicitor with intermitiant short? these radios are getting up there in 20yr age mark and will be due for a recap job in a few years in best case scenerio if used lightly.
you are right radio is getting slowly to that age but my feeling is telling me it is something different..
Glad to see you back Peter!
We have the the USA version of that Icom radio in our community Emergency Operations Center. I doubt it has more than a few minutes transmitting time. It will most likely fail when we need it most.
lets hope the best that it will work when you need it most...
would you please posting the problem of the alinco dx77...how to repair the tx/rx relay .thank you
Hi Peter, great video; merry Christmas and happy new year to you and family 73's.
Hallo Peter, tolles Video; frohe Weihnachten und frohes neues Jahr für Sie und Familie 73
Hi Bob thank you and have a nice x-mas as well.
Great set of videos. I'm glad you are back we thought you had "disappeared" was gonna ask the aliens for your return ...;-) hope to see more soon ..Cheers
lol yeah right ;-)
Nice to see you, again. You are a favorite of mine.
Intermitted problems are a hair puller for sure...I have an ADI 220 radio with intermitted screen issues I gave up on for now lol. Those 7000's where known for over heating which is why I got rid of mine years ago. Hopefully you can get to the root off the problem it'd be interesting to see what happened.
Merry Christmas to you and your family and happy New year's. 🎄🥂
Heard a bit of your dilemma re an intermittent drop out..
Don't think this will help but I ran into a problem with an FT757/II where the varactor associated with the PLL, being forward biased by an intermittently bad electrolytic capacitor.. drove me nuts until I caught the little devil in the act.. the small cap showed no evidence of failure.. no leaking, bulging, etc.. So much equipment has been lost to defective electrolytic caps..
Regards, Dennis WB8DT..
yes you are right. Thanks for feed back
Welcome back! Don't worry about your English, your efforts are valiant and handiwork speaks for itself. Every successful repair is a victory over chaos and disintegration.
What I would do is replace the largest relevant electrolytic capacitors, maybe all, reflux most or all solder joints, polish all accessible contacts. If it tests as working send it back to the customer with a modest bill for refurbishing, not repair. And a suggestion to contact you should the problem reappear and be more reproduceable.
thanks for feed back
Great to see you posting again
Haven't watched yet, but just wanted to say thanks for another video and;
Merry Christmas Peter to you and your family. "Oh Crisymas Baum, Oh Crisymas Baum"... I hope that's right.
hope you had a nice x-mas too thank you
It good to seeing you again.
Hi Peter HappyNewyear to you and your family2021. peter there must be a fine hair crack in some of the traces, its just a thought if you could wrap the radio in polythine and put it in a freezer to see if it would give you time to check for the fault just an Idea you friend John
Looks like you have the beginning of a best selling suspense drama. I can’t wait for the rest of the episodes.
73’s VK3KZ
Nice to see you posting again!
Very glad to see you back! As a ham your knowledge is invaluable. 73 de YV5GRB
At the other end of the scale is the owner who could have "repaired" his own radio by simply reading the manual to operate the rig correctly. Happened just yesterday the OM wanted me to investigate no output on his HF radio on my bench - 10 minutes on the phone allowed me to remotely diagnose the problem instead and he's a happy camper now (hint: Kenwood rigs used to need you to engage the VOX button to transmit CW!). Hopefully we'll be seeing more videos Peter...maybe the fix for this radio! 73 - Dino KLØS
yes that is a valid point Dino. We call it the fault is between the headphone lol 73
Glad to see you back
Hi Peter ! Nice to see you again !....Complicated defect. I saw some videos of the IC7000 with power loss in all bands and the cause was the pre driver. I think the condition changes with the radio open without the covers. Just to comment, Icoms react strangely with high temperatures and high currents. I had a 746pro that had power loss and did not tune in at 15m. the Pre driver had a crack and the bias current was high there was high oscillation at 15M. Well, I hope you can find this "Icom riddle". Good luck and regards - 73 PY2NDB
Yes the conditions are changing with lid open but therefore we were heating it with the hair dryer extensively. Thanks for comment!
@@TRXLab Thanks so much for your feedback.I believe you may have already done a number of procedures including this. Is there any significant variation in pa current when in TX ? With the equipment closed checking this condition, if so it may be that the HEATING of the PA stage is heating some track of some SMD component causing with the weld lose conductivity. I've had a problem of this, my solution was a general rewelding, 73's
Hang in there Peter, All of us that work in the wonder field of electronics has those days that turns into weeks sometimes.
FYI, Category has its stress on the first syllable, with a slight stress on the third.
or maybe just say type?... LOL
good point much easier for me to pronounce..
Glad you're back, Peter! Question: how can I get an IC-7000 with a main unit problem to you?
I ask if what is the correct bias of icom7000 driver unit pd55015 Thanks...
As simple as this sounds have you checked the mic plug? I imagine you have but what if there is a wire break in the mic cord? Or a loose crimp on the jack? I fully understand intermittent problems you can't fix it until it messes up. good luck finding the problem.
yes the red TX light is showing up any time I press PTT.
Olá Amigo !! tenho aqui os IC 7200, acredito que são os unicos que estão me durando aqui, esse 7000 é completo mas incendeia o driver ...73
In your case, time is of great importance, that is, the expediency of repair in general. The easiest way, in the presence of spare parts that are known to be in good condition, is to change the boards in turn and check. Then look for the problem in the faulty unit.
It's better for the user to sell this radio and buy a new one.
Do you have any thoughts on converting the IC-7000 power plug to Powerpoles?
The real question is how much time do you spend chasing the intermittent issue? You may need to have the issue happen more than once to pinpoint the source of the problem. As a mechanic I see intermittent problems all the time on vehicles. Time is money in our business and sometimes if the intermittent issue doesn't show up after an hour of messing with it, we either call the customer and ask for more time or send it down the road.
that is completely true time is money and you can't work for ever on a problem...
nice to see you ,as always
thank you Dennis!
Nothing worse than intermittent problems. Just like cars! All the best for the Christmas/New Year period Peter 👍🏻
Realistically the difference between 100 watts and 120 watts is pretty insignificant and not worth the risk. You're better off using your energy on improving your antenna.
Assuming you do NOT intend to be omnidirectional. Important sometimes when calling CQ to any direction such as in contests. I only say that because many times we get suggestions to improve the antenna rather than the amplifier but younger hams also need to know that the price for antenna directive gain is nulls. External linear amps do serve a good purpose in gaining 1 - 2 S units (6-12 dB) using the same antenna, over 100W. A single S unit is a lot. In your example I completely agree, 10log(125/100) =
Ic 7000 always had problems
true
Thanks Peter, Merry Christmas for you and your and stay safe my dear friend. 73s Pasquale IW0HEX
Thank you Pasquale. Merry X-mas to you and yours! Stay healthy my friend 73
At some point you need to give the unit back to the customer and tell them that until the problem is more constant it can not be repaired.
I have that exact radio in my shack, have you encountered the issue where transmitting / keying the radio would trigger a reset? Checked the SWR and the potential corrosion on the fuse contacts and all is good on that side. That problem too seems to be intermittent.
You can't fix a problem that does not show up. I had a few of these when I was a technician over a 30 year period and customers don't really understand that you don't have a crystal ball and that you can't fix it based on the problem description, you must actually experience it... Was that word you were having trouble with category-- cat-a-gory?
many customers really don't understand such issues even when you try to explain it very much in detail..
Good to see U again :)
Them radios had heating issues.
They get to hot even when only receiving, i heard people saying, thats one of the reasons why i wouldnt buy a ic7000. the dsp isnt really usefull.
Can you use a thermal imaging camera?
Merry Christmas and see you next time
not in this case as we don't have a short which would show up a hot spot...
~Have you tried freezer spray?
thanks Simon, yes have tried freezer with no success...
It may need some RF grease on the signal launcher.
that is the solution lol
People experience the same type of intermittent issues with car repairs.Nightmares.
sure we have it everywhere...